Combined stripper and thread-cutter for sewing-machines.



J. R. MOFFATT. COMBINED STRIPPER AND THREAD CUTTER FOR SEWING MACHINES.APPLICATION FILED OCT. 28. I913.

1,150,614., Patented Aug. 17, 1915;

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APPLICATION FILED OCT. 2 1913- l,150,6l% Patented Aug. 17, 1915.

2 SHEETS-SHEET 2- ings, consistsof a main casing 1, in which same. I

tially a vertical plane with the upper edges 7 JAMES R. MOFFATT, OFCHICAGO, ILLINOIS, .ASSIGNOR T0 UNION SPECIAL MACHINE COMPANY, CHICAGO,ILLINOIS, A- CORPORATION OF ILLINOIS.

COMBINED STRIPPER AND THREAD-CUTTER FOR SEWINGMACHINES.

Specification. of Letters Patent. Patented Aug. ll'ifl, 11915,

Application filed October 28, 1913. Serial No. 797,779.

ful Improvements in Combined. Strippers and Thread-Cutters forSewing-Machines,of

which the following is a description, reference being had to theaccompanying drawing and to the figures-of reference marked thereon.

The invention relates to new and useful improvementsin overseamingmachines, and more particularly to an overseaming ma chine wherein thefabric is supported and fed to the stitching mechanism in substantiallya vertical plane by intermittently r0- tating feed wheels.

An object of the invention is to provide means which will operate inconnection with the feed wheels to strip the fabric from the feedwheels, so as to permit the free feed of the same through the machine.

A further object of the invention is to provide a thread cutter, whichis-located adjacent the stitching point, and which also assists instripping the fabric from one of the feed wheels.

In the drawings which show by way of illustration one embodiment of theinvention,-Figure 1 is a side view of a sewing machine of the abovecharacter, having my improvements applied thereto; Fig. 2 is a plan Viewof a portion of the same, showing the feed wheels, the strippers andthread cutter; Fig. 3 is a similar view showing thestripper fingers andcutter in plan; and Fig. 4 is a detail showing the combined threadcutter and stripper detached from the machine.

The machine as illustrated in the drawis mounted the main shaft and theoperating mechanism for the stitch-forming elements. This main casing 1carries a fixed bracket 2 in which is journaled a feed shaft carrying afeed=wheel 3. Pivoted to the fixed bracket is a movable bracket 4carrying a feed shaft having a feed wheel 5. Each'of the feed wheels 3and 5 is provided with a serrated or toothed section, which is adaptedto clamp the fabric and feed the The fabric is supported insubstanthereof projecting slightly above the feed wheels. These feedwheels may be rotated by any suitable means; The outer bracketsupporting the feed wheel 5 is yieldingly pressed toward the casing and,therefore,

yieldingly moves the feed wheels into contact with the fabric.

A needle 6 reciprocates in a substantially horizontal plane above thefeed wheels, and a looper 7 cooperates with the needle in forming anover-edge stitch.

The movable bracket 1 has an outwardly and upwardly projecting arm 8,which carries a needle guide-9. Also bolted to the arm 8 is a stripperplate 10. This stripper plate 10 is secured to the arm by suitable bolts11. The stripper plate is in the form of a finger which is curved on itsinner face, substantially concentric to the curvature of the feed wheel5, while its outer face is curved so as to lie eccentric to thecurvature of the feed wheel. Outer curved surface of said'fixed platetherefore crosses the periphery of the wheel. This curved strippingfinger extends substantially to the stitching point and the inner end ofthe finger is underneath the feed wheel. Said stripper finger at itsouter end projects considerably beyond the feed wheel, so that as thefabric passes the stitching point, this stripper plate or finger willengage the fabric and crowd it out of the 85 teeth or serrations in thefeed wheel.

Cooperating with the feed wheel 3 is a second stripper plate 12. Thisstripper plate is secured by suitable boltsor screws 13, to the maincasing of the machine. Said stripper plate extends underneath the feedwheel 3 and toward the stitching point. It

is shaped in a general way similarly to the stripper plate 10, so itsouter face will engage the fabric and crowd the same out of the teeth orserrations in the feed wheel 3. Said stripper plate 12 is formed with aV- shaped notch 14, the edges, of which are sharpened so as to form athread cutter.

The fabric led between the feed wheels is stripped from both of the feedwheels, so it is free therefrom, and when the end ofthe article isreached, a chain of stitches may be formed which connect the same to thenext article to be stitched, and this chain of stitchesmay be led intothe thread cutter 14 and the articles severed from one another.

It is obvious that minor changes in the details of construction may bemade, without departingfrom the spirit of the invention, as set forth inthe appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is":

1. A sewing machine including in combination, cooperating feed wheelsfor supporting and feeding a fabric in substantially a vertical plane, aneedle moving in a horizontal plane above the feed wheel, a fixed plateextending to a point adjacent the needle and having a thread-cutting.surface formed thereon.

3. A sewing machine including in combination, cooperating feed wheelsfor supporting and feeding a fabric in substantially a vertical plane, aneedle moving in a horizontal' plane above the feed Wheel, a fixed plateextending to a point adjacent the needle and having a thread-cuttingsurface formed thereon.- said fixed plate extending underneath said feedWheel and having a curved surface crossing the periphery thereof forstripping the material from said feed wheel.

4. A sewing machine including in combination, cooperating feed wheelsfor supporting and feeding a fabric in substantially a vertical plane, aneedle moving in a horizontal plane above the feed wheel, a fixed plateextending to a point adjacent the nee- 'dle and having a thread-cuttingsurface formed thereon, said fixed plate extending underneath said feedwheel and having a curved surface crossing the periphery thereof forstripping the material from said feed wheel, and a stripper plateextending underneath the outer feed wheel and having its outer surfacecurved, so as to crossthe periphery of said outer feed wheel and stripthe fabric from said outer feed wheel.

5. A sewing machine includingiin comnation, cooperating feed wheels forsupporting and feeding a fabric in substantially a vertical plane, meansincluding a plate for stripping the fabric from said feed wheels,

said plate carrying means for cutting the thread. 7

In testimony whereof, I afiix my signature, in the presence of twowitnesses.

JAMES R. MOFFATT.

Witnesses:

' A. B. CLoTHIER,

A. C. ABEL.

